Chennai Weather: Rainy Monday with High Humidity and Air Quality Alert
Chennai residents should prepare for a wet and humid start to the week as the city is forecast to experience moderate rainfall on Monday, January 26, 2026. The meteorological conditions indicate an 81% probability of precipitation throughout the day, creating potentially challenging conditions for commuters and outdoor activities.
Detailed Weather Forecast for January 26
The day's temperature is expected to range from a comfortable low of 23.3°C to a high of 27.9°C, averaging around 25°C. While these temperatures avoid extreme heat, the elevated humidity level of approximately 77% will create a sticky, muggy atmosphere that may persist even during breaks in rainfall.
Wind speeds are projected to reach up to 24.1 kmph at times, offering occasional relief from the humidity but potentially exacerbating rainfall intensity during showers. The total rainfall accumulation could reach around 11 mm, with visibility expected to average about 9.8 km but possibly decreasing during heavier precipitation periods.
Sunrise occurred at 6:36 AM, with sunset scheduled for 6:08 PM, meaning evening commutes will likely occur in fading light on potentially wet roads. The rainfall pattern is anticipated to follow Chennai's typical coastal pattern of intermittent pulses rather than continuous downpours.
Air Quality Update and Health Considerations
Sunday's air quality reading registered AQI-IN 75, categorized as moderate on the Indian scale. On the US scale, this corresponds to AQI-US 117, indicating air that may not be suitable for everyone, particularly sensitive groups.
The primary pollutants contributing to this reading were particulate matter, with PM2.5 levels at 44 and PM10 at 53. Carbon monoxide was also detected at a concentration of 366. While moderate air quality is generally manageable for most people, it can trigger symptoms like scratchy throats, mild headaches, or wheezing in vulnerable individuals.
Today's rainfall may provide temporary relief by washing away some airborne particles, but high humidity could make the air feel heavier. If winds diminish between showers, pollution might accumulate locally rather than dispersing effectively.
Practical Recommendations for Residents
Given the forecast conditions, several precautions are advisable:
- Carry waterproof gear: An umbrella or rain jacket is essential equipment for the day
- Choose appropriate footwear: Non-slip shoes will help navigate potentially waterlogged areas
- Allow extra travel time: Two-wheeler commuters should anticipate delays due to wet road conditions
- Modify exercise routines: Consider lighter indoor workouts or short walks during rain lulls
- Monitor pollution exposure: Sensitive individuals should avoid main-road stretches where PM2.5 concentrations may spike
- Stay hydrated: High humidity can cause sweating without immediate awareness of fluid loss
Weekly Weather Outlook Beyond Monday
The forecast shows a significant improvement beginning Tuesday, January 27, continuing through February 1. During this period:
- Sunny skies are expected daily with zero millimeters of rainfall
- Daytime temperatures will remain steady between 28°C and 28.6°C
- Night temperatures will gradually cool, reaching approximately 20.8°C on January 30
- Wind speeds will moderate to 17-19 kmph range
- Humidity levels will decrease to the upper 60s percentage range
Tuesday and Wednesday appear particularly favorable for outdoor activities, offering sunny conditions without rain interruptions. Additionally, the moon approaches its full phase on February 1, promising brighter evening skies later in the week once cloud cover diminishes.
Residents should exercise caution today regarding travel safety and pollution exposure while looking forward to clearer conditions in the coming days. The weather transition from today's rainy pattern to sustained sunshine represents a typical seasonal shift for Chennai during this period.
